Search found 277 matches

by McKlaud
Tue Mar 13, 2018 9:47 pm
Forum: Development
Topic: do we still use UHF modulators ?
Replies: 17
Views: 3968

Re: do we still use UHF modulators ?

Well, with some new ULA's replacement no any super composite board is needed. The ULA could drive a TV directly with the proper black level.

See this below
by McKlaud
Tue Mar 13, 2018 9:36 pm
Forum: Development
Topic: do we still use UHF modulators ?
Replies: 17
Views: 3968

Re: do we still use UHF modulators ?

As some of you may know i am developing a new ULA replacement. so should it be able to drive the UHF modlator? Or is composite video only ok. Regards Andy Hi Andy In my ULA development I dropped compatibility with the modulator. However if you think about the 100% drop-in replacement for the origin...
by McKlaud
Mon Mar 12, 2018 11:53 pm
Forum: ZX BASIC
Topic: Kaleidoscope simulator
Replies: 4
Views: 1742

Re: Kaleidoscope simulator

I preferred a square mosaic created by the previous version. Issue 2 works fine but the mosaic is bit overstretched horizontally for my taste.

Anyway, good job!
by McKlaud
Sun Mar 11, 2018 10:19 pm
Forum: ZX BASIC
Topic: Kaleidoscope simulator
Replies: 4
Views: 1742

Re: Kaleidoscope simulator

Nice!
by McKlaud
Sun Mar 11, 2018 10:18 pm
Forum: Sinclair Misc
Topic: ZX-Team Meeting at Mahlerts and Web-Cam
Replies: 7
Views: 2097

Re: ZX-Team Meeting at Mahlerts and Web-Cam

Zschopower: Thank you for sharing this information.

Participants from Denmark, The Netherlands, Switzerland and Germany only. Well, it seems that the ZX81 is there still strong. Keep going. :geek:
by McKlaud
Sun Mar 11, 2018 8:14 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 62640

Re: ZX81 ULA-in-a-CPLD

Yeah! Master of Disaster :mrgreen:
by McKlaud
Sun Mar 11, 2018 7:33 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 62640

Re: ZX81 ULA-in-a-CPLD

8-) Congratulation Andy!!! 8-)

My ULA was also tortured and I did a few minor mods earlier today. Now Zeddy boots up every time to the 'K' prompt. Screen and border inversion works as it should. Anyway, still works in progress.
by McKlaud
Sat Mar 10, 2018 9:27 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 62640

Re: ZX81 ULA-in-a-CPLD

:mrgreen: Superfo: welcome to the club :mrgreen:

Andy:

The small smd inductor (e.g. 1uH) and than a 0.1uF capacitor between supply rail and GND might be a good idea. I will give it a try.
by McKlaud
Sat Mar 10, 2018 6:52 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 62640

Re: ZX81 ULA-in-a-CPLD

It is look like that I should assemble the board again, because in this one I've got some synch issues. When I press the board in the socket hard I am getting the "K" prompt on the screen. There is some noise on the video out too. I've been thinking about different type of a NPN transistor there. At...
by McKlaud
Sat Mar 10, 2018 6:34 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 62640

Re: ZX81 ULA-in-a-CPLD

Mark,

Andy is miles ahead of me. :mrgreen: :mrgreen: His ULA is working perfectly fine :geek: My version is nearly there.